Diagnostic imaging techniques of the respiratory tract of sheep

Castells, Enrique; Lacasta, Delia; Climent, María; Pérez, Marta; Sanroman, Fidel; Jiménez, C.; Ferrer, Luís Miguel

doi:10.1016/j.smallrumres.2019.05.021

Cited by 16 publications

(24 citation statements)

References 16 publications

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“…A similar case was also described in goats by Leask et al [38]. Diagnostic imaging techniques, especially ultrasonography and computed tomography, can be very useful tools to diagnose the visceral form of the disease [39][40][41]. Furthermore, in order to eradicate the disease, ELISA test can be performed, although with a sensitivity of 87% and a specificity of 98% [42], prolonging the testing period, and extending time to eradication can occur, having consequences for the economic value of the flock [43].…”

Section: Discussionsupporting

confidence: 59%

The Relevance of Caseous Lymphadenitis as a Cause of Culling in Adult Sheep

Ruíz

Ferrer

Ramos

et al. 2020

Animals

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Four hundred and ninety-eight culled sheep received at the Ruminant Clinical Service of the Veterinary Faculty of Zaragoza, Spain, were examined in life and after humanitarian sacrifice in order to reach the final diagnosis of the cause of culling and to evaluate the presence of caseous lymphadenitis (CLA) lesions. One hundred and forty-seven of the 498 studied animals (29.52%) showed CLA compatible lesions that were subsequently confirmed by Corynebacterium pseudotuberculosis isolation. One hundred and seven of the 147 CLA affected animals presenting the visceral clinical form of the disease (72.79%), while only 32 animals were affected by the superficial form (21.77%). In addition, eight animals were found to be affected in both the visceral and the superficial presentations (5.44%). Eighty-four of the 147 CLA-affected animals (57.14%) did not show any concurrent disease, considering, in this case, CLA the main cause of culling (84/498: 16.87%). In the superficial presentation, the retropharyngeal lymph node, as a sole lesion, was the most frequently affected (13/32: 40.63%). Further, in the visceral form of the disease, 85.06% of the affected animals had the lesions located in the respiratory system (91/107: 85.06%). CLA was revealed as an important cause of culling in sheep production.

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Section: Discussionsupporting

confidence: 59%

The Relevance of Caseous Lymphadenitis as a Cause of Culling in Adult Sheep

Ruíz

Ferrer

Ramos

et al. 2020

Animals

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“…), emphasising the potential of micro‐CT techniques to non‐invasively obtain accurate quantitative data for comparative anatomical studies. Non‐invasive CT techniques can also be a powerful tool for the diagnosis and imaging of oestrosis within the host (Castells et al ., 2019). Finally, studies of the gut and Malpighian tubules of Drosophila melanogaster have shown value even for comparison with the human condition (Gautam et al ., 2017; Miguel‐Aliaga et al ., 2018; Capo et al ., 2019).…”

Section: Discussionmentioning

confidence: 99%

Major differences in the larval anatomy of the digestive and excretory systems of three Oestridae species revealed by micro‐CT

Martín‐Vega

Clark

Ferrer

et al. 2020

Medical Vet Entomology

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Oestrid flies (Diptera: Oestridae) do not feed during the adult stage, so they depend on an efficient assimilation and storage of nutrients during their parasitic larval stage. We describe the general morphology and provide volumetric data for the digestive and excretory organs of the three larval instars of the nasal bot fly Oestrus ovis L., using micro‐computed tomography. The size of the digestive and excretory organs greatly increased across larval instars. In all instars, the two salivary glands were remarkably large and formed a ‘glandular band’ by coming together, but without lumina uniting, at their posterior ends. The distal region of the anterior Malpighian tubules was greatly enlarged and full of highly radio‐opaque concretions. Moreover, the anatomy of O. ovis third‐instar larva was compared to that of two species of, respectively, similar and different feeding habits: Cephenemyia stimulator (Clark) and Hypoderma actaeon Brauer. Whereas the general morphology and arrangement of the digestive and excretory systems of C. stimulator was similar to that of O. ovis, some differences were observed in H. actaeon: a swollen anterior region of the midgut, salivary glands shorter and not forming a ‘band’ and anterior Malpighian tubules narrowly uniform throughout their entire length.

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“…Along with these, two lateral radiographical projections were made, one on each side of the affected area. Although this disease does not affect the nasal bone as clearly as the enzootic nasal tumour,8 an increased opacity was observed inside the dorsal nose chamber. All these images were compatible with CPR, although affecting, for the first time in such a strong extent, the dorsal nasal turbinate and the ethmoidal area.…”

Section: Investigationsmentioning

confidence: 78%

“…In conclusion, thermography is a very useful, cheap and handle tool for the diagnosis of upper respiratory tract diseases of sheep, especially at the beginning of the process, revealing the location of the affected area and facilitating the final diagnosis of the disease 8…”

Section: Discussionmentioning

confidence: 99%

Use of thermography for the diagnosis of chronic proliferative rhinitis in sheep and its application in the differential diagnosis of the first case affecting the dorsal turbinate

López-Tamayo

Rubira²,

Heras

et al. 2020

Vet Record Case Reports

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Chronic proliferative rhinitis (CPR) is a fatal prognosis upper respiratory tract disease that affects sheep and is associated with Salmonella enterica subspecies diarizonae serotype 61:k:1, 5, (7). It may be unilateral or bilateral, and although minor changes have been seen in dorsal turbinate, the ventral turbinate is always affected, which makes it possible to observe the proliferative tissue emerging from the nares.The following publication describes the case of an ewe severely affected by a bilateral inflammatory process of the upper respiratory tract. S enterica subspecies diarizonae was isolated from nasal swabs; however, the hottest area observed by a thermal imaging camera was not the ventral area, as usually seen in this process, but the middle area, where the dorsal turbinate is located. In addition, no proliferative tissue was seen through the nostril. At postmortem examination, it was confirmed that CPR seriously affected, for the first time, the dorsal turbinate and ethmoidal areas. Thermographic cameras are useful tools for the diagnosis of upper respiratory tract diseases in sheep.

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Diagnostic imaging techniques of the respiratory tract of sheep

Cited by 16 publications

References 16 publications

The Relevance of Caseous Lymphadenitis as a Cause of Culling in Adult Sheep

The Relevance of Caseous Lymphadenitis as a Cause of Culling in Adult Sheep

Major differences in the larval anatomy of the digestive and excretory systems of three Oestridae species revealed by micro‐CT

Use of thermography for the diagnosis of chronic proliferative rhinitis in sheep and its application in the differential diagnosis of the first case affecting the dorsal turbinate

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